Omachi, Nagano, Japan Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Omachi, Nagano, Japan
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
4th Aug 2023
49AQILowest AQI recorded on
24th Aug 2023
14AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 46 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025
Omachi, Nagano, Japan
AQI
Day
Night
.
4 AM2nd Aug 2025
7 PM
3 AM3rd Aug 2025
Day time
Avg. Highest Time
12AMNaNth undefined
AQI
Avg. Lowest Time
12AMNaNth undefined
AQI
Night time
Avg. Highest Time
12PM2nd Aug
56AQI
Avg. Lowest Time
12AM3rd Aug
42AQI
In the last 24 hours,
Omachi's AQI reached its highest point of 56 at 12 PM during the Night, while the lowest point, 42, was recorded at 12 AM during the Night between 2nd Aug and 3rd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Omachi, Nagano, Japan
JulAug
04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd
Day
Night
4th Jul 2025594 AMAQI
4th Jul 2025565 AMAQI
4th Jul 2025566 AMAQI
4th Jul 2025557 AMAQI
4th Jul 2025568 AMAQI
4th Jul 2025599 AMAQI
4th Jul 20256310 AMAQI
4th Jul 20256611 AMAQI
4th Jul 20256812 PMAQI
4th Jul 2025671 PMAQI
4th Jul 2025702 PMAQI
4th Jul 2025713 PMAQI
4th Jul 2025714 PMAQI
4th Jul 2025695 PMAQI
4th Jul 2025696 PMAQI
4th Jul 2025687 PMAQI
4th Jul 2025678 PMAQI
4th Jul 2025599 PMAQI
4th Jul 20255810 PMAQI
4th Jul 20255811 PMAQI
5th Jul 20255812 AMAQI
5th Jul 2025581 AMAQI
5th Jul 2025572 AMAQI
5th Jul 2025573 AMAQI
20°C14/28°C
5th Jul 2025574 AMAQI
5th Jul 2025595 AMAQI
5th Jul 2025596 AMAQI
5th Jul 2025597 AMAQI
5th Jul 2025618 AMAQI
5th Jul 2025589 AMAQI
5th Jul 20255310 AMAQI
5th Jul 20255511 AMAQI
5th Jul 20255512 PMAQI
5th Jul 2025581 PMAQI
5th Jul 2025612 PMAQI
5th Jul 2025613 PMAQI
5th Jul 2025564 PMAQI
5th Jul 2025555 PMAQI
5th Jul 2025566 PMAQI
5th Jul 2025567 PMAQI
5th Jul 2025578 PMAQI
5th Jul 2025579 PMAQI
5th Jul 20255710 PMAQI
5th Jul 20255811 PMAQI
6th Jul 20255612 AMAQI
6th Jul 2025581 AMAQI
6th Jul 2025582 AMAQI
6th Jul 2025583 AMAQI
19°C13/29°C
6th Jul 2025584 AMAQI
6th Jul 2025585 AMAQI
6th Jul 2025586 AMAQI
6th Jul 2025577 AMAQI
6th Jul 2025588 AMAQI
6th Jul 2025479 AMAQI
6th Jul 20253710 AMAQI
6th Jul 20253911 AMAQI
6th Jul 20253912 PMAQI
6th Jul 2025461 PMAQI
6th Jul 2025472 PMAQI
6th Jul 2025463 PMAQI
6th Jul 2025474 PMAQI
6th Jul 2025465 PMAQI
6th Jul 2025466 PMAQI
6th Jul 2025487 PMAQI
6th Jul 2025488 PMAQI
6th Jul 2025569 PMAQI
6th Jul 20255610 PMAQI
6th Jul 20255711 PMAQI
7th Jul 20255812 AMAQI
7th Jul 2025561 AMAQI
7th Jul 2025572 AMAQI
7th Jul 2025573 AMAQI
21°C14/30°C
7th Jul 2025564 AMAQI
7th Jul 2025555 AMAQI
7th Jul 2025566 AMAQI
7th Jul 2025567 AMAQI
7th Jul 2025568 AMAQI
7th Jul 2025409 AMAQI
7th Jul 20253510 AMAQI
7th Jul 20253711 AMAQI
7th Jul 20253912 PMAQI
7th Jul 2025491 PMAQI
7th Jul 2025502 PMAQI
7th Jul 2025513 PMAQI
7th Jul 2025514 PMAQI
7th Jul 2025515 PMAQI
7th Jul 2025516 PMAQI
7th Jul 2025507 PMAQI
7th Jul 2025528 PMAQI
7th Jul 2025579 PMAQI
7th Jul 20255710 PMAQI
7th Jul 20255611 PMAQI
8th Jul 20255712 AMAQI
8th Jul 2025561 AMAQI
8th Jul 2025562 AMAQI
8th Jul 2025553 AMAQI
21°C15/28°C
8th Jul 2025564 AMAQI
8th Jul 2025555 AMAQI
8th Jul 2025556 AMAQI
8th Jul 2025557 AMAQI
8th Jul 2025558 AMAQI
8th Jul 2025439 AMAQI
8th Jul 20254510 AMAQI
8th Jul 20255011 AMAQI
8th Jul 20255612 PMAQI
8th Jul 2025601 PMAQI
8th Jul 2025592 PMAQI
8th Jul 2025583 PMAQI
8th Jul 2025604 PMAQI
8th Jul 2025625 PMAQI
8th Jul 2025596 PMAQI
8th Jul 2025587 PMAQI
8th Jul 2025588 PMAQI
8th Jul 2025579 PMAQI
8th Jul 20255610 PMAQI
8th Jul 20255711 PMAQI
9th Jul 20255512 AMAQI
9th Jul 2025551 AMAQI
9th Jul 2025562 AMAQI
9th Jul 2025563 AMAQI
22°C16/29°C
9th Jul 2025564 AMAQI
9th Jul 2025565 AMAQI
9th Jul 2025566 AMAQI
9th Jul 2025567 AMAQI
9th Jul 2025568 AMAQI
9th Jul 2025569 AMAQI
9th Jul 20256010 AMAQI
9th Jul 20256211 AMAQI
9th Jul 20256412 PMAQI
9th Jul 2025621 PMAQI
9th Jul 2025642 PMAQI
9th Jul 2025653 PMAQI
9th Jul 2025684 PMAQI
9th Jul 2025705 PMAQI
9th Jul 2025686 PMAQI
9th Jul 2025637 PMAQI
9th Jul 2025638 PMAQI
9th Jul 2025579 PMAQI
9th Jul 20255610 PMAQI
9th Jul 20255711 PMAQI
10th Jul 20255712 AMAQI
10th Jul 2025561 AMAQI
10th Jul 2025562 AMAQI
10th Jul 2025553 AMAQI
21°C16/27°C
10th Jul 2025564 AMAQI
10th Jul 2025565 AMAQI
10th Jul 2025576 AMAQI
10th Jul 2025567 AMAQI
10th Jul 2025578 AMAQI
10th Jul 2025489 AMAQI
10th Jul 20254510 AMAQI
10th Jul 20255211 AMAQI
10th Jul 20255912 PMAQI
10th Jul 2025611 PMAQI
10th Jul 2025612 PMAQI
10th Jul 2025643 PMAQI
10th Jul 2025644 PMAQI
10th Jul 2025615 PMAQI
10th Jul 2025596 PMAQI
10th Jul 2025577 PMAQI
10th Jul 2025568 PMAQI
10th Jul 2025559 PMAQI
10th Jul 20255410 PMAQI
10th Jul 20255411 PMAQI
11th Jul 20255412 AMAQI
11th Jul 2025561 AMAQI
11th Jul 2025572 AMAQI
11th Jul 2025573 AMAQI
20°C14/27°C
11th Jul 2025574 AMAQI
11th Jul 2025575 AMAQI
11th Jul 2025576 AMAQI
11th Jul 2025577 AMAQI
11th Jul 2025578 AMAQI
11th Jul 2025389 AMAQI
11th Jul 20252810 AMAQI
11th Jul 20252611 AMAQI
11th Jul 20252612 PMAQI
11th Jul 2025361 PMAQI
11th Jul 2025382 PMAQI
11th Jul 2025403 PMAQI
11th Jul 2025444 PMAQI
11th Jul 2025465 PMAQI
11th Jul 2025476 PMAQI
11th Jul 2025437 PMAQI
11th Jul 2025478 PMAQI
11th Jul 2025539 PMAQI
11th Jul 20255310 PMAQI
11th Jul 20255311 PMAQI
12th Jul 20255312 AMAQI
12th Jul 2025551 AMAQI
12th Jul 2025552 AMAQI
12th Jul 2025553 AMAQI
19°C13/26°C
12th Jul 2025564 AMAQI
12th Jul 2025545 AMAQI
12th Jul 2025546 AMAQI
12th Jul 2025557 AMAQI
12th Jul 2025548 AMAQI
12th Jul 2025359 AMAQI
12th Jul 20252710 AMAQI
12th Jul 20252411 AMAQI
12th Jul 20252512 PMAQI
12th Jul 2025361 PMAQI
12th Jul 2025382 PMAQI
12th Jul 2025413 PMAQI
12th Jul 2025424 PMAQI
12th Jul 2025445 PMAQI
12th Jul 2025436 PMAQI
12th Jul 2025427 PMAQI
12th Jul 2025408 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025531 AMAQI
13th Jul 2025542 AMAQI
13th Jul 2025543 AMAQI
20°C13/27°C
13th Jul 2025544 AMAQI
13th Jul 2025535 AMAQI
13th Jul 2025536 AMAQI
13th Jul 2025537 AMAQI
13th Jul 2025538 AMAQI
13th Jul 2025389 AMAQI
13th Jul 20252210 AMAQI
13th Jul 20252311 AMAQI
13th Jul 20252612 PMAQI
13th Jul 2025331 PMAQI
13th Jul 2025332 PMAQI
13th Jul 2025333 PMAQI
13th Jul 2025374 PMAQI
13th Jul 2025395 PMAQI
13th Jul 2025436 PMAQI
13th Jul 2025447 PMAQI
13th Jul 2025468 PMAQI
13th Jul 2025519 PMAQI
13th Jul 20255210 PMAQI
13th Jul 20255211 PMAQI
14th Jul 20255112 AMAQI
14th Jul 2025521 AMAQI
14th Jul 2025532 AMAQI
14th Jul 2025533 AMAQI
22°C16/29°C
14th Jul 2025524 AMAQI
14th Jul 2025505 AMAQI
14th Jul 2025506 AMAQI
14th Jul 2025517 AMAQI
14th Jul 2025518 AMAQI
14th Jul 2025379 AMAQI
14th Jul 20252910 AMAQI
14th Jul 20252311 AMAQI
14th Jul 20252312 PMAQI
14th Jul 2025311 PMAQI
14th Jul 2025292 PMAQI
14th Jul 2025303 PMAQI
14th Jul 2025324 PMAQI
14th Jul 2025325 PMAQI
14th Jul 2025326 PMAQI
14th Jul 2025317 PMAQI
14th Jul 2025368 PMAQI
14th Jul 2025489 PMAQI
14th Jul 20254810 PMAQI
14th Jul 20254811 PMAQI
15th Jul 20254912 AMAQI
15th Jul 2025501 AMAQI
15th Jul 2025522 AMAQI
15th Jul 2025523 AMAQI
22°C18/28°C
15th Jul 2025524 AMAQI
15th Jul 2025505 AMAQI
15th Jul 2025506 AMAQI
15th Jul 2025517 AMAQI
15th Jul 2025508 AMAQI
15th Jul 2025359 AMAQI
15th Jul 20252910 AMAQI
15th Jul 20253411 AMAQI
15th Jul 20253512 PMAQI
15th Jul 2025371 PMAQI
15th Jul 2025382 PMAQI
15th Jul 2025383 PMAQI
15th Jul 2025384 PMAQI
15th Jul 2025375 PMAQI
15th Jul 2025396 PMAQI
15th Jul 2025387 PMAQI
15th Jul 2025388 PMAQI
15th Jul 2025479 PMAQI
15th Jul 20254710 PMAQI
15th Jul 20254811 PMAQI
16th Jul 20254812 AMAQI
16th Jul 2025481 AMAQI
16th Jul 2025502 AMAQI
16th Jul 2025513 AMAQI
21°C15/25°C
16th Jul 2025514 AMAQI
16th Jul 2025485 AMAQI
16th Jul 2025496 AMAQI
16th Jul 2025487 AMAQI
16th Jul 2025498 AMAQI
16th Jul 2025389 AMAQI
16th Jul 20253410 AMAQI
16th Jul 20253711 AMAQI
16th Jul 20254112 PMAQI
16th Jul 2025451 PMAQI
16th Jul 2025492 PMAQI
16th Jul 2025493 PMAQI
16th Jul 2025504 PMAQI
16th Jul 2025525 PMAQI
16th Jul 2025546 PMAQI
16th Jul 2025557 PMAQI
16th Jul 2025548 PMAQI
16th Jul 2025509 PMAQI
16th Jul 20254910 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254812 AMAQI
17th Jul 2025481 AMAQI
17th Jul 2025482 AMAQI
17th Jul 2025493 AMAQI
20°C12/28°C
17th Jul 2025494 AMAQI
17th Jul 2025495 AMAQI
17th Jul 2025506 AMAQI
17th Jul 2025497 AMAQI
17th Jul 2025498 AMAQI
17th Jul 2025409 AMAQI
17th Jul 20253810 AMAQI
17th Jul 20253811 AMAQI
17th Jul 20254112 PMAQI
17th Jul 2025421 PMAQI
17th Jul 2025432 PMAQI
17th Jul 2025473 PMAQI
17th Jul 2025464 PMAQI
17th Jul 2025495 PMAQI
17th Jul 2025516 PMAQI
17th Jul 2025517 PMAQI
17th Jul 2025478 PMAQI
17th Jul 2025479 PMAQI
17th Jul 20254810 PMAQI
17th Jul 20254711 PMAQI
18th Jul 20254712 AMAQI
18th Jul 2025481 AMAQI
18th Jul 2025492 AMAQI
18th Jul 2025483 AMAQI
19°C16/21°C
18th Jul 2025494 AMAQI
18th Jul 2025485 AMAQI
18th Jul 2025486 AMAQI
18th Jul 2025487 AMAQI
18th Jul 2025488 AMAQI
18th Jul 2025259 AMAQI
18th Jul 20251710 AMAQI
18th Jul 20251811 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025261 PMAQI
18th Jul 2025272 PMAQI
18th Jul 2025283 PMAQI
18th Jul 2025294 PMAQI
18th Jul 2025285 PMAQI
18th Jul 2025296 PMAQI
18th Jul 2025297 PMAQI
18th Jul 2025338 PMAQI
18th Jul 2025429 PMAQI
18th Jul 20254310 PMAQI
18th Jul 20254211 PMAQI
19th Jul 20254412 AMAQI
19th Jul 2025451 AMAQI
19th Jul 2025482 AMAQI
19th Jul 2025483 AMAQI
22°C16/29°C
19th Jul 2025474 AMAQI
19th Jul 2025455 AMAQI
19th Jul 2025466 AMAQI
19th Jul 2025457 AMAQI
19th Jul 2025468 AMAQI
19th Jul 2025279 AMAQI
19th Jul 20251810 AMAQI
19th Jul 20252011 AMAQI
19th Jul 20252312 PMAQI
19th Jul 2025271 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025263 PMAQI
19th Jul 2025284 PMAQI
19th Jul 2025315 PMAQI
19th Jul 2025356 PMAQI
19th Jul 2025357 PMAQI
19th Jul 2025358 PMAQI
19th Jul 2025409 PMAQI
19th Jul 20254010 PMAQI
19th Jul 20253911 PMAQI
20th Jul 20254012 AMAQI
20th Jul 2025421 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025453 AMAQI
21°C14/29°C
20th Jul 2025444 AMAQI
20th Jul 2025425 AMAQI
20th Jul 2025426 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025428 AMAQI
20th Jul 2025329 AMAQI
20th Jul 20252210 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252112 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025232 PMAQI
20th Jul 2025253 PMAQI
20th Jul 2025254 PMAQI
20th Jul 2025275 PMAQI
20th Jul 2025296 PMAQI
20th Jul 2025307 PMAQI
20th Jul 2025328 PMAQI
20th Jul 2025399 PMAQI
20th Jul 20254010 PMAQI
20th Jul 20253811 PMAQI
21st Jul 20253712 AMAQI
21st Jul 2025401 AMAQI
21st Jul 2025422 AMAQI
21st Jul 2025423 AMAQI
22°C15/30°C
21st Jul 2025414 AMAQI
21st Jul 2025385 AMAQI
21st Jul 2025396 AMAQI
21st Jul 2025397 AMAQI
21st Jul 2025388 AMAQI
21st Jul 2025279 AMAQI
21st Jul 20252510 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252812 PMAQI
21st Jul 2025291 PMAQI
21st Jul 2025302 PMAQI
21st Jul 2025313 PMAQI
21st Jul 2025364 PMAQI
21st Jul 2025415 PMAQI
21st Jul 2025446 PMAQI
21st Jul 2025487 PMAQI
21st Jul 2025468 PMAQI
21st Jul 2025419 PMAQI
21st Jul 20254110 PMAQI
21st Jul 20254111 PMAQI
22nd Jul 20254012 AMAQI
22nd Jul 2025391 AMAQI
22nd Jul 2025382 AMAQI
22nd Jul 2025393 AMAQI
22°C15/30°C
22nd Jul 2025384 AMAQI
22nd Jul 2025365 AMAQI
22nd Jul 2025366 AMAQI
22nd Jul 2025367 AMAQI
22nd Jul 2025378 AMAQI
22nd Jul 2025429 AMAQI
22nd Jul 20254110 AMAQI
22nd Jul 20254111 AMAQI
22nd Jul 20254512 PMAQI
22nd Jul 2025491 PMAQI
22nd Jul 2025492 PMAQI
22nd Jul 2025503 PMAQI
22nd Jul 2025494 PMAQI
22nd Jul 2025505 PMAQI
22nd Jul 2025476 PMAQI
22nd Jul 2025487 PMAQI
22nd Jul 2025478 PMAQI
22nd Jul 2025439 PMAQI
22nd Jul 20254310 PMAQI
22nd Jul 20254211 PMAQI
23rd Jul 20254212 AMAQI
23rd Jul 2025401 AMAQI
23rd Jul 2025392 AMAQI
23rd Jul 2025383 AMAQI
21°C15/28°C
23rd Jul 2025394 AMAQI
23rd Jul 2025405 AMAQI
23rd Jul 2025416 AMAQI
23rd Jul 2025417 AMAQI
23rd Jul 2025408 AMAQI
23rd Jul 2025359 AMAQI
23rd Jul 20253710 AMAQI
23rd Jul 20254511 AMAQI
23rd Jul 20254812 PMAQI
23rd Jul 2025501 PMAQI
23rd Jul 2025512 PMAQI
23rd Jul 2025513 PMAQI
23rd Jul 2025504 PMAQI
23rd Jul 2025505 PMAQI
23rd Jul 2025506 PMAQI
23rd Jul 2025517 PMAQI
23rd Jul 2025508 PMAQI
23rd Jul 2025449 PMAQI
23rd Jul 20254510 PMAQI
23rd Jul 20254411 PMAQI
24th Jul 20254312 AMAQI
24th Jul 2025421 AMAQI
24th Jul 2025422 AMAQI
24th Jul 2025413 AMAQI
21°C15/29°C
24th Jul 2025434 AMAQI
24th Jul 2025425 AMAQI
24th Jul 2025426 AMAQI
24th Jul 2025427 AMAQI
24th Jul 2025428 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253110 AMAQI
24th Jul 20253411 AMAQI
24th Jul 20253712 PMAQI
24th Jul 2025401 PMAQI
24th Jul 2025422 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025424 PMAQI
24th Jul 2025455 PMAQI
24th Jul 2025476 PMAQI
24th Jul 2025437 PMAQI
24th Jul 2025408 PMAQI
24th Jul 2025419 PMAQI
24th Jul 20254110 PMAQI
24th Jul 20254111 PMAQI
25th Jul 20254112 AMAQI
25th Jul 2025421 AMAQI
25th Jul 2025442 AMAQI
25th Jul 2025443 AMAQI
22°C15/30°C
25th Jul 2025434 AMAQI
25th Jul 2025425 AMAQI
25th Jul 2025436 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025448 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20252610 AMAQI
25th Jul 20252611 AMAQI
25th Jul 20252512 PMAQI
25th Jul 2025281 PMAQI
25th Jul 2025342 PMAQI
25th Jul 2025343 PMAQI
25th Jul 2025344 PMAQI
25th Jul 2025345 PMAQI
25th Jul 2025346 PMAQI
25th Jul 2025337 PMAQI
25th Jul 2025368 PMAQI
25th Jul 2025409 PMAQI
25th Jul 20253910 PMAQI
25th Jul 20254011 PMAQI
26th Jul 20254012 AMAQI
26th Jul 2025411 AMAQI
26th Jul 2025412 AMAQI
26th Jul 2025423 AMAQI
22°C15/30°C
26th Jul 2025424 AMAQI
26th Jul 2025415 AMAQI
26th Jul 2025416 AMAQI
26th Jul 2025407 AMAQI
26th Jul 2025408 AMAQI
26th Jul 2025299 AMAQI
26th Jul 20252510 AMAQI
26th Jul 20252511 AMAQI
26th Jul 20252312 PMAQI
26th Jul 2025251 PMAQI
26th Jul 2025252 PMAQI
26th Jul 2025243 PMAQI
26th Jul 2025264 PMAQI
26th Jul 2025265 PMAQI
26th Jul 2025276 PMAQI
26th Jul 2025287 PMAQI
26th Jul 2025308 PMAQI
26th Jul 2025369 PMAQI
26th Jul 20253610 PMAQI
26th Jul 20253611 PMAQI
27th Jul 20253612 AMAQI
27th Jul 2025371 AMAQI
27th Jul 2025392 AMAQI
27th Jul 2025403 AMAQI
23°C17/30°C
27th Jul 2025394 AMAQI
27th Jul 2025385 AMAQI
27th Jul 2025376 AMAQI
27th Jul 2025377 AMAQI
27th Jul 2025378 AMAQI
27th Jul 2025279 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252011 AMAQI
27th Jul 20252112 PMAQI
27th Jul 2025231 PMAQI
27th Jul 2025242 PMAQI
27th Jul 2025253 PMAQI
27th Jul 2025244 PMAQI
27th Jul 2025245 PMAQI
27th Jul 2025256 PMAQI
27th Jul 2025277 PMAQI
27th Jul 2025288 PMAQI
27th Jul 2025349 PMAQI
27th Jul 20253310 PMAQI
27th Jul 20253411 PMAQI
28th Jul 20253312 AMAQI
28th Jul 2025341 AMAQI
28th Jul 2025382 AMAQI
28th Jul 2025373 AMAQI
22°C16/28°C
28th Jul 2025364 AMAQI
28th Jul 2025355 AMAQI
28th Jul 2025356 AMAQI
28th Jul 2025347 AMAQI
28th Jul 2025348 AMAQI
28th Jul 2025289 AMAQI
28th Jul 20252810 AMAQI
28th Jul 20252511 AMAQI
28th Jul 20252412 PMAQI
28th Jul 2025291 PMAQI
28th Jul 2025312 PMAQI
28th Jul 2025293 PMAQI
28th Jul 2025344 PMAQI
28th Jul 2025335 PMAQI
28th Jul 2025356 PMAQI
28th Jul 2025367 PMAQI
28th Jul 2025368 PMAQI
28th Jul 2025339 PMAQI
28th Jul 20253310 PMAQI
28th Jul 20253211 PMAQI
29th Jul 20253112 AMAQI
29th Jul 2025321 AMAQI
29th Jul 2025352 AMAQI
29th Jul 2025343 AMAQI
21°C15/30°C
29th Jul 2025344 AMAQI
29th Jul 2025335 AMAQI
29th Jul 2025346 AMAQI
29th Jul 2025337 AMAQI
29th Jul 2025338 AMAQI
29th Jul 2025309 AMAQI
29th Jul 20253010 AMAQI
29th Jul 20253011 AMAQI
29th Jul 20253112 PMAQI
29th Jul 2025311 PMAQI
29th Jul 2025322 PMAQI
29th Jul 2025333 PMAQI
29th Jul 2025354 PMAQI
29th Jul 2025375 PMAQI
29th Jul 2025396 PMAQI
29th Jul 2025397 PMAQI
29th Jul 2025388 PMAQI
29th Jul 2025349 PMAQI
29th Jul 20253410 PMAQI
29th Jul 20253311 PMAQI
30th Jul 20253412 AMAQI
30th Jul 2025331 AMAQI
30th Jul 2025332 AMAQI
30th Jul 2025323 AMAQI
22°C15/30°C
30th Jul 2025324 AMAQI
30th Jul 2025325 AMAQI
30th Jul 2025326 AMAQI
30th Jul 2025327 AMAQI
30th Jul 2025328 AMAQI
30th Jul 2025329 AMAQI
30th Jul 20253310 AMAQI
30th Jul 20253511 AMAQI
30th Jul 20253912 PMAQI
30th Jul 2025401 PMAQI
30th Jul 2025402 PMAQI
30th Jul 2025413 PMAQI
30th Jul 2025384 PMAQI
30th Jul 2025355 PMAQI
30th Jul 2025366 PMAQI
30th Jul 2025387 PMAQI
30th Jul 2025388 PMAQI
30th Jul 2025359 PMAQI
30th Jul 20253410 PMAQI
30th Jul 20253411 PMAQI
31st Jul 20253312 AMAQI
31st Jul 2025331 AMAQI
31st Jul 2025332 AMAQI
31st Jul 2025343 AMAQI
22°C15/31°C
31st Jul 2025334 AMAQI
31st Jul 2025335 AMAQI
31st Jul 2025336 AMAQI
31st Jul 2025337 AMAQI
31st Jul 2025338 AMAQI
31st Jul 2025339 AMAQI
31st Jul 20253310 AMAQI
31st Jul 20253111 AMAQI
31st Jul 20253012 PMAQI
31st Jul 2025281 PMAQI
31st Jul 2025302 PMAQI
31st Jul 2025323 PMAQI
31st Jul 2025364 PMAQI
31st Jul 2025365 PMAQI
31st Jul 2025446 PMAQI
31st Jul 2025487 PMAQI
31st Jul 2025498 PMAQI
31st Jul 2025539 PMAQI
31st Jul 20255210 PMAQI
31st Jul 20255111 PMAQI
1st Aug 20254612 AMAQI
1st Aug 2025481 AMAQI
1st Aug 2025442 AMAQI
1st Aug 2025423 AMAQI
22°C15/31°C
1st Aug 2025404 AMAQI
1st Aug 2025425 AMAQI
1st Aug 2025426 AMAQI
1st Aug 2025437 AMAQI
1st Aug 2025448 AMAQI
1st Aug 2025529 AMAQI
1st Aug 20255510 AMAQI
1st Aug 20255811 AMAQI
1st Aug 20255512 PMAQI
1st Aug 2025631 PMAQI
1st Aug 2025542 PMAQI
1st Aug 2025543 PMAQI
1st Aug 2025584 PMAQI
1st Aug 2025595 PMAQI
1st Aug 2025566 PMAQI
1st Aug 2025567 PMAQI
1st Aug 2025518 PMAQI
1st Aug 2025489 PMAQI
1st Aug 20254810 PMAQI
1st Aug 20254611 PMAQI
2nd Aug 20254412 AMAQI
2nd Aug 2025441 AMAQI
2nd Aug 2025472 AMAQI
2nd Aug 2025423 AMAQI
22°C15/31°C
2nd Aug 2025464 AMAQI
2nd Aug 2025495 AMAQI
2nd Aug 2025466 AMAQI
2nd Aug 2025457 AMAQI
2nd Aug 2025488 AMAQI
2nd Aug 2025549 AMAQI
2nd Aug 20254910 AMAQI
2nd Aug 20255211 AMAQI
2nd Aug 20255612 PMAQI
2nd Aug 2025541 PMAQI
2nd Aug 2025552 PMAQI
2nd Aug 2025563 PMAQI
2nd Aug 2025544 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025517 PMAQI
2nd Aug 2025518 PMAQI
2nd Aug 2025479 PMAQI
2nd Aug 20254510 PMAQI
2nd Aug 20254411 PMAQI
3rd Aug 20254212 AMAQI
3rd Aug 2025441 AMAQI
3rd Aug 2025442 AMAQI
3rd Aug 2025443 AMAQI
--°C/°C
3rd Aug 2025484 AMAQI
4 AM3rd Aug 2025495 AMAQI
3rd Aug 2025476 AMAQI
3rd Aug 2025437 AMAQI
11 AM
7 PM
11 PM
3 AM
--°C/°C
Day time
Avg. Highest Time
4 AM - 8 AM
47AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
10 AM - 12 PM
36AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 8 AM (Avg. 47), while the lowest AQI was between 10 AM to 12 PM (Avg. 36).
Night time
Avg. Highest Time
12 AM - 11 PM
46AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
46AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 46), while the lowest AQI was between 12 AM to 11 PM (Avg. 46).
2025 Days Vs Air Quality
Omachi, Nagano, Japan
2025
85%
182
15%
31
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
182 DaysModerate
31 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 85%
Health Risk Level:
Low
In 2025, 85% of 214 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Omachi, Nagano, Japan
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
1st January 2025
32AQI
32AQI
2nd January 2025
32AQI
32AQI
3rd January 2025
29AQI
29AQI
4th January 2025
29AQI
29AQI
5th January 2025
28AQI
28AQI
6th January 2025
35AQI
35AQI
7th January 2025
29AQI
29AQI
8th January 2025
28AQI
28AQI
9th January 2025
27AQI
27AQI
10th January 2025
25AQI
25AQI
11th January 2025
27AQI
27AQI
12th January 2025
28AQI
28AQI
13th January 2025
28AQI
28AQI
14th January 2025
31AQI
31AQI
15th January 2025
28AQI
28AQI
16th January 2025
26AQI
26AQI
17th January 2025
27AQI
27AQI
18th January 2025
28AQI
28AQI
19th January 2025
32AQI
32AQI
20th January 2025
33AQI
33AQI
21st January 2025
37AQI
37AQI
22nd January 2025
36AQI
36AQI
23rd January 2025
49AQI
49AQI
24th January 2025
43AQI
43AQI
25th January 2025
38AQI
38AQI
26th January 2025
35AQI
35AQI
27th January 2025
31AQI
31AQI
28th January 2025
31AQI
31AQI
29th January 2025
31AQI
31AQI
30th January 2025
33AQI
33AQI
31st January 2025
32AQI
32AQI
1st February 2025
40AQI
40AQI
2nd February 2025
38AQI
38AQI
3rd February 2025
37AQI
37AQI
4th February 2025
33AQI
33AQI
5th February 2025
34AQI
34AQI
6th February 2025
31AQI
31AQI
7th February 2025
33AQI
33AQI
8th February 2025
31AQI
31AQI
9th February 2025
30AQI
30AQI
10th February 2025
30AQI
30AQI
11th February 2025
32AQI
32AQI
12th February 2025
30AQI
30AQI
13th February 2025
31AQI
31AQI
14th February 2025
34AQI
34AQI
15th February 2025
31AQI
31AQI
16th February 2025
37AQI
37AQI
17th February 2025
38AQI
38AQI
18th February 2025
33AQI
33AQI
19th February 2025
33AQI
33AQI
20th February 2025
31AQI
31AQI
21st February 2025
31AQI
31AQI
22nd February 2025
32AQI
32AQI
23rd February 2025
32AQI
32AQI
24th February 2025
32AQI
32AQI
25th February 2025
34AQI
34AQI
26th February 2025
38AQI
38AQI
27th February 2025
47AQI
47AQI
28th February 2025
43AQI
43AQI
1st March 2025
47AQI
47AQI
2nd March 2025
43AQI
43AQI
3rd March 2025
39AQI
39AQI
4th March 2025
38AQI
38AQI
5th March 2025
35AQI
35AQI
6th March 2025
33AQI
33AQI
7th March 2025
36AQI
36AQI
8th March 2025
37AQI
37AQI
9th March 2025
36AQI
36AQI
10th March 2025
39AQI
39AQI
11th March 2025
37AQI
37AQI
12th March 2025
33AQI
33AQI
13th March 2025
46AQI
46AQI
14th March 2025
38AQI
38AQI
15th March 2025
38AQI
38AQI
16th March 2025
26AQI
26AQI
17th March 2025
26AQI
26AQI
18th March 2025
27AQI
27AQI
19th March 2025
23AQI
23AQI
20th March 2025
31AQI
31AQI
21st March 2025
44AQI
44AQI
22nd March 2025
48AQI
48AQI
23rd March 2025
60AQI
60AQI
24th March 2025
60AQI
60AQI
25th March 2025
74AQI
74AQI
26th March 2025
78AQI
78AQI
27th March 2025
68AQI
68AQI
28th March 2025
46AQI
46AQI
29th March 2025
41AQI
41AQI
30th March 2025
36AQI
36AQI
31st March 2025
35AQI
35AQI
1st April 2025
33AQI
33AQI
2nd April 2025
28AQI
28AQI
3rd April 2025
24AQI
24AQI
4th April 2025
25AQI
25AQI
5th April 2025
32AQI
32AQI
6th April 2025
29AQI
29AQI
7th April 2025
36AQI
36AQI
8th April 2025
41AQI
41AQI
9th April 2025
30AQI
30AQI
10th April 2025
43AQI
43AQI
11th April 2025
40AQI
40AQI
12th April 2025
47AQI
47AQI
13th April 2025
27AQI
27AQI
14th April 2025
35AQI
35AQI
15th April 2025
23AQI
23AQI
16th April 2025
31AQI
31AQI
17th April 2025
43AQI
43AQI
18th April 2025
50AQI
50AQI
19th April 2025
63AQI
63AQI
20th April 2025
51AQI
51AQI
21st April 2025
45AQI
45AQI
22nd April 2025
49AQI
49AQI
23rd April 2025
32AQI
32AQI
24th April 2025
31AQI
31AQI
25th April 2025
41AQI
41AQI
26th April 2025
50AQI
50AQI
27th April 2025
47AQI
47AQI
28th April 2025
47AQI
47AQI
29th April 2025
43AQI
43AQI
30th April 2025
54AQI
54AQI
1st May 2025
50AQI
50AQI
2nd May 2025
36AQI
36AQI
3rd May 2025
38AQI
38AQI
4th May 2025
34AQI
34AQI
5th May 2025
40AQI
40AQI
6th May 2025
36AQI
36AQI
7th May 2025
33AQI
33AQI
8th May 2025
36AQI
36AQI
9th May 2025
33AQI
33AQI
10th May 2025
27AQI
27AQI
11th May 2025
28AQI
28AQI
12th May 2025
34AQI
34AQI
13th May 2025
42AQI
42AQI
14th May 2025
49AQI
49AQI
15th May 2025
51AQI
51AQI
16th May 2025
52AQI
52AQI
17th May 2025
39AQI
39AQI
18th May 2025
42AQI
42AQI
19th May 2025
43AQI
43AQI
20th May 2025
57AQI
57AQI
21st May 2025
63AQI
63AQI
22nd May 2025
54AQI
54AQI
23rd May 2025
54AQI
54AQI
24th May 2025
46AQI
46AQI
25th May 2025
32AQI
32AQI
26th May 2025
33AQI
33AQI
27th May 2025
36AQI
36AQI
28th May 2025
33AQI
33AQI
29th May 2025
39AQI
39AQI
30th May 2025
31AQI
31AQI
31st May 2025
28AQI
28AQI
1st June 2025
27AQI
27AQI
2nd June 2025
38AQI
38AQI
3rd June 2025
31AQI
31AQI
4th June 2025
35AQI
35AQI
5th June 2025
35AQI
35AQI
6th June 2025
45AQI
45AQI
7th June 2025
48AQI
48AQI
8th June 2025
56AQI
56AQI
9th June 2025
58AQI
58AQI
10th June 2025
54AQI
54AQI
11th June 2025
39AQI
39AQI
12th June 2025
43AQI
43AQI
13th June 2025
48AQI
48AQI
14th June 2025
39AQI
39AQI
15th June 2025
29AQI
29AQI
16th June 2025
33AQI
33AQI
17th June 2025
42AQI
42AQI
18th June 2025
46AQI
46AQI
19th June 2025
49AQI
49AQI
20th June 2025
53AQI
53AQI
21st June 2025
54AQI
54AQI
22nd June 2025
56AQI
56AQI
23rd June 2025
46AQI
46AQI
24th June 2025
46AQI
46AQI
25th June 2025
43AQI
43AQI
26th June 2025
43AQI
43AQI
27th June 2025
49AQI
49AQI
28th June 2025
46AQI
46AQI
29th June 2025
49AQI
49AQI
30th June 2025
54AQI
54AQI
1st July 2025
56AQI
56AQI
2nd July 2025
52AQI
52AQI
3rd July 2025
54AQI
54AQI
4th July 2025
57AQI
57AQI
5th July 2025
60AQI
60AQI
6th July 2025
55AQI
55AQI
7th July 2025
59AQI
59AQI
8th July 2025
62AQI
62AQI
9th July 2025
63AQI
63AQI
10th July 2025
58AQI
58AQI
11th July 2025
49AQI
49AQI
12th July 2025
48AQI
48AQI
13th July 2025
49AQI
49AQI
14th July 2025
45AQI
45AQI
15th July 2025
39AQI
39AQI
16th July 2025
45AQI
45AQI
17th July 2025
37AQI
37AQI
18th July 2025
39AQI
39AQI
19th July 2025
38AQI
38AQI
20th July 2025
39AQI
39AQI
21st July 2025
39AQI
39AQI
22nd July 2025
43AQI
43AQI
23rd July 2025
45AQI
45AQI
24th July 2025
47AQI
47AQI
25th July 2025
48AQI
48AQI
26th July 2025
44AQI
44AQI
27th July 2025
42AQI
42AQI
28th July 2025
46AQI
46AQI
29th July 2025
50AQI
50AQI
30th July 2025
48AQI
48AQI
31st July 2025
47AQI
47AQI
1st August 2025
46AQI
46AQI
32AQI
34AQI
42AQI
39AQI
40AQI
44AQI
48AQI
46AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202540AQI
31
28
26
5
27
3
25
6
23
7
21
10
1
182
31
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
January32AQI
202435AQI
31
27
22
4
10
2
20
28
2
31
31
23
6
31
29
1
31
314
15
Highest AQI recorded in
March44AQI
Lowest AQI recorded in
December27AQI
202341AQI
29
2
25
3
25
6
23
7
22
9
21
7
16
15
31
30
30
26
3
31
309
52
Highest AQI recorded in
July49AQI
Lowest AQI recorded in
September31AQI
202239AQI
14
11
20
11
22
8
24
1
28
31
30
27
197
30
Highest AQI recorded in
May50AQI
Lowest AQI recorded in
August17AQI
202133AQI
30
1
27
1
26
3
18
1
19
12
13
17
27
4
31
28
31
29
21
300
39
Highest AQI recorded in
June54AQI
Lowest AQI recorded in
January16AQI
202021AQI
12
1
20
1
18
21
4
31
11
10
1
19
29
30
31
222
16
1
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
May7AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
41AQILeast Polluted Year Recorded
2020(Avg.)
21AQIOmachi's annual 2025 AQI (40) shows an average percentage change of 26.5% (worsened AQI) compared to previous years: 2020 (21), 2021 (33), 2022 (39), 2023 (41), 2024 (35).
